Explanation: Tyndall's effect is the appearance of light scattering on the particles of colloidal dimensions. ... Because of the small particle size, the solutions do not show Tyndall's effect. Suspensions have larger particles than colloids and thats why they show the Tyndall effect.

Which one will show Tyndall effect?

-The scattering of light by colloidal solution tells us that the colloidal particles are much bigger than the particles of a true solution. - We can see that the correct options are (B) and (D), milk and starch solution are the colloids, hence these will show the tyndall effect.

What causes the Tyndall effect in suspensions?

It is caused by reflection of the incident radiation from the surfaces of the particles, reflection from the interior walls of the particles, and refraction and diffraction of the radiation as it passes through the particles.